I don't think he hits it quite on the head.

Normies get their truth from two sources: the "authorities" (primarily the mainstream media) and personal experience. In normal circumstances, these two circles have only a tiny intersection in the Venn diagram of life.

Now, however, their personal experiences are coming into contradiction with what they are instructed is the truth. They are told the economy is great, but they're going broke just trying to pay the bills. They are told Trump (again, still) is going to destroy the country if he gets reelected, but they remember when none of the current shitstorm was happening just a few years ago.

But the thing is, trust in the authorities is their very mode of thinking. To relieve the stress of the contradiction, they just stop listening. Then they don't know what to think. It's not that they'll believe anything, they believe nothing.

You can see it clearly with Democrats. Most can no longer deny Biden is a complete train wreck, but you never see them follow through with that. They never say, "Yeah, I'm just seeing it now, but I guess what they've been saying about Biden for a while was actually true. I was lied to, and I was a fool to believe it. I need to figure out pronto who I should be listening to. Fuck, maybe I actually should have voted for the other guy." Nope, they're just adrift, don't know which way to turn.

So what we're dealing with, in the end, is the way the human mind actually works. For anyone reading this, if you don't identify closely with this description of normies, understand clearly that it doesn't make you smarter or better. Different humans just have starkly different ways their minds operate, as surely as they have differently colored eyes.